Screws · ASME B18.6.1 · Application guide

What Are Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) Used For?

Typical applications, the industries that specify wood screws, inch (flat and oval head, slotted and phillips), and how to choose the right size, material and finish for the joint.

Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) are used for inch wood screws with flat or oval countersunk heads, slotted and Phillips. They are manufactured to ASME B18.6.1, and selection is driven by the screw size, the fit and tolerance the assembly requires, and the service environment.

Primary duty: Inch wood screws with flat or oval countersunk heads, slotted and Phillips
Governing standard: ASME B18.6.1
Screw size range: #1 to #24
Category: Screws

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

The primary duty of Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) is inch wood screws with flat or oval countersunk heads, slotted and Phillips. Below: the sectors that specify them in volume, the checklist used to select the right size and material for the application, installation notes, and the known limits of the type. Stocked across roughly 1 to 24, they cover general to heavy-duty work.

Typical Applications for Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips)

The most common settings where these are specified:

Carpentry: timber joints.
Cabinetry: hardware.
Restoration: matching period screws.
Boat building: timber fixing.

How to Specify Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) for Your Application

Size: Match the nominal size to the mating thread or hole. This product spans 1–24; check the full table below for the exact dimensions of each size.
Drive & head: Pick the drive (socket, cross, slot) and head style for the tool access and seating surface; a recessed drive resists cam-out under power tools.
Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
Standard: This product is supplied to ASME B18.6.1. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

Match the driver exactly to the recess (PH ≠ PZ; hex key sizes per ISO 2936) and keep the tool axial — side load is the main cause of stripped drives.
In tapped holes, engage a thread length of at least 1× the nominal diameter in steel, 2× in aluminum.
Set power tools to a torque that seats the head without embedding it into the mating surface.

Common Selection Mistakes with Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips)

Under-sizing the drive for the installation torque — a small recess at high torque strips before the screw is seated.
Using a countersunk head in thin sheet where the countersink removes most of the load-bearing material.
Specifying stainless in high-strength duty: A2-70 is roughly class 7 steel, not a 10.9 substitute.

Where Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) Are Not the Right Choice

Not for high-preload structural joints (use a property-class bolt and nut), and not in thin sheet where a self-drilling or self-tapping type suits better.

Custom manufacturing · Made to drawing

Need a wood screws, inch (flat and oval head, slotted and phillips) outside the standard range?

Dimensions, material, finish and form are specified from the drawing — a screw outside the standard range is a variation on existing tooling rather than a new design. Made by cold heading or warm forging.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

Custom screw manufacturing Send a drawing

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Dimensioned line drawing of #0 Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) to ASME B18.6.1. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

Type: Cross recessed oval countersunk head wood screws
Pitch P (in): 0.031
E (in): 0.064
F (in): 0.01
Amax (in): 0.119
Amin (in): 0.099
Head height k (in): 0.035
J (in): 0.023
T (in): 0.015
R (in): 0.031
Length range l (in): 1/4"~1/2"

Sends the selected values to the quote form below.

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The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

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Specification

Item / category Standard Size(s) Material / finish Quantity

Business Information

Company * Contact Name * Email * Phone (with country code) Country / Region

Notes

Dimensions & Specifications (ASME B18.6.1)

Size	Type	Pitch P (in)	E (in)	F (in)	Amax (in)	Amin (in)	Head height k (in)	J (in)	T (in)	R (in)	Length range l (in)	Reference standard
#0	Cross recessed oval countersunk head wood screws	0.031	0.064	0.01	0.119	0.099	0.035	0.023	0.015	0.031	1/4"~1/2"	ASME B18.6.1
#0	Slotted oval countersunk head wood screws	0.031	0.064	0.01	0.119	0.099	0.035	0.023	0.015	0.031	1/4"~1/2"	ASME B18.6.1
#0	Cross recessed flat countersunk head wood screws	0.031	0.064	0.01	0.119	0.099	0.035	0.023	0.015	0.031	1/4"~1/2"	ASME B18.6.1
#0	Slotted flat countersunk head wood screws	0.031	0.064	0.01	0.119	0.099	0.035	0.023	0.015	0.031	1/4"~1/2"	ASME B18.6.1
#1	Cross recessed oval countersunk head wood screws	0.036	0.077	0.01	0.146	0.123	0.043	0.026	0.019	0.031	1/4"~1/2"	ASME B18.6.1
#1	Slotted oval countersunk head wood screws	0.036	0.077	0.01	0.146	0.123	0.043	0.026	0.019	0.031	1/4"~1/2"	ASME B18.6.1
#1	Cross recessed flat countersunk head wood screws	0.036	0.077	0.01	0.146	0.123	0.043	0.026	0.019	0.031	1/4"~1/2"	ASME B18.6.1
#1	Slotted flat countersunk head wood screws	0.036	0.077	0.01	0.146	0.123	0.043	0.026	0.019	0.031	1/4"~1/2"	ASME B18.6.1
#2	Cross recessed oval countersunk head wood screws	0.038	0.09	0.01	0.172	0.147	0.051	0.031	0.023	0.031	1/4"~1/2"	ASME B18.6.1
#2	Slotted oval countersunk head wood screws	0.038	0.09	0.01	0.172	0.147	0.051	0.031	0.023	0.031	1/4"~1/2"	ASME B18.6.1
#2	Cross recessed flat countersunk head wood screws	0.038	0.09	0.01	0.172	0.147	0.051	0.031	0.023	0.031	1/4"~1/2"	ASME B18.6.1
#2	Slotted flat countersunk head wood screws	0.038	0.09	0.01	0.172	0.147	0.051	0.031	0.023	0.031	1/4"~1/2"	ASME B18.6.1
#3	Cross recessed oval countersunk head wood screws	0.042	0.103	0.014	0.199	0.171	0.059	0.035	0.027	0.031	1/4"~5/8"	ASME B18.6.1
#3	Slotted oval countersunk head wood screws	0.042	0.103	0.014	0.199	0.171	0.059	0.035	0.027	0.031	1/4"~5/8"	ASME B18.6.1
#3	Cross recessed flat countersunk head wood screws	0.042	0.103	0.014	0.199	0.171	0.059	0.035	0.027	0.031	1/4"~5/8"	ASME B18.6.1
#3	Slotted flat countersunk head wood screws	0.042	0.103	0.014	0.199	0.171	0.059	0.035	0.027	0.031	1/4"~5/8"	ASME B18.6.1
#4	Cross recessed oval countersunk head wood screws	0.045	0.116	0.016	0.225	0.195	0.067	0.039	0.03	0.031	3/8"~1 1/2"	ASME B18.6.1
#4	Slotted oval countersunk head wood screws	0.045	0.116	0.016	0.225	0.195	0.067	0.039	0.03	0.031	3/8"~1 1/2"	ASME B18.6.1
#4	Cross recessed flat countersunk head wood screws	0.045	0.116	0.016	0.225	0.195	0.067	0.039	0.03	0.031	3/8"~1 1/2"	ASME B18.6.1
#4	Slotted flat countersunk head wood screws	0.045	0.116	0.016	0.225	0.195	0.067	0.039	0.03	0.031	3/8"~1 1/2"	ASME B18.6.1
#5	Cross recessed oval countersunk head wood screws	0.05	0.129	0.018	0.252	0.22	0.075	0.043	0.034	0.062	3/8"~1 1/2"	ASME B18.6.1
#5	Slotted oval countersunk head wood screws	0.05	0.129	0.018	0.252	0.22	0.075	0.043	0.034	0.062	3/8"~1 1/2"	ASME B18.6.1
#5	Cross recessed flat countersunk head wood screws	0.05	0.129	0.018	0.252	0.22	0.075	0.043	0.034	0.062	3/8"~1 1/2"	ASME B18.6.1
#5	Slotted flat countersunk head wood screws	0.05	0.129	0.018	0.252	0.22	0.075	0.043	0.034	0.062	3/8"~1 1/2"	ASME B18.6.1
#6	Cross recessed oval countersunk head wood screws	0.056	0.142	0.02	0.279	0.244	0.083	0.048	0.038	0.062	3/8"~2"	ASME B18.6.1
#6	Slotted oval countersunk head wood screws	0.056	0.142	0.02	0.279	0.244	0.083	0.048	0.038	0.062	3/8"~2"	ASME B18.6.1
#6	Cross recessed flat countersunk head wood screws	0.056	0.142	0.02	0.279	0.244	0.083	0.048	0.038	0.062	3/8"~2"	ASME B18.6.1
#6	Slotted flat countersunk head wood screws	0.056	0.142	0.02	0.279	0.244	0.083	0.048	0.038	0.062	3/8"~2"	ASME B18.6.1
#7	Cross recessed oval countersunk head wood screws	0.062	0.155	0.022	0.305	0.268	0.091	0.048	0.041	0.062	3/8"~2"	ASME B18.6.1
#7	Slotted oval countersunk head wood screws	0.062	0.155	0.022	0.305	0.268	0.091	0.048	0.041	0.062	3/8"~2"	ASME B18.6.1
#7	Cross recessed flat countersunk head wood screws	0.062	0.155	0.022	0.305	0.268	0.091	0.048	0.041	0.062	3/8"~2"	ASME B18.6.1
#7	Slotted flat countersunk head wood screws	0.062	0.155	0.022	0.305	0.268	0.091	0.048	0.041	0.062	3/8"~2"	ASME B18.6.1
#8	Cross recessed oval countersunk head wood screws	0.067	0.168	0.023	0.332	0.292	0.1	0.054	0.045	0.062	1/2"~3"	ASME B18.6.1
#8	Slotted oval countersunk head wood screws	0.067	0.168	0.023	0.332	0.292	0.1	0.054	0.045	0.062	1/2"~3"	ASME B18.6.1
#8	Cross recessed flat countersunk head wood screws	0.067	0.168	0.023	0.332	0.292	0.1	0.054	0.045	0.062	1/2"~3"	ASME B18.6.1
#8	Slotted flat countersunk head wood screws	0.067	0.168	0.023	0.332	0.292	0.1	0.054	0.045	0.062	1/2"~3"	ASME B18.6.1
#9	Cross recessed oval countersunk head wood screws	0.071	0.181	0.026	0.358	0.316	0.108	0.054	0.049	0.062	5/8"~3"	ASME B18.6.1
#9	Slotted oval countersunk head wood screws	0.071	0.181	0.026	0.358	0.316	0.108	0.054	0.049	0.062	5/8"~3"	ASME B18.6.1
#9	Cross recessed flat countersunk head wood screws	0.071	0.181	0.026	0.358	0.316	0.108	0.054	0.049	0.062	5/8"~3"	ASME B18.6.1
#9	Slotted flat countersunk head wood screws	0.071	0.181	0.026	0.358	0.316	0.108	0.054	0.049	0.062	5/8"~3"	ASME B18.6.1
#10	Cross recessed oval countersunk head wood screws	0.077	0.194	0.03	0.385	0.34	0.116	0.06	0.053	0.062	5/8"~3 1/2"	ASME B18.6.1
#10	Slotted oval countersunk head wood screws	0.077	0.194	0.03	0.385	0.34	0.116	0.06	0.053	0.062	5/8"~3 1/2"	ASME B18.6.1
#10	Cross recessed flat countersunk head wood screws	0.077	0.194	0.03	0.385	0.34	0.116	0.06	0.053	0.062	5/8"~3 1/2"	ASME B18.6.1
#10	Slotted flat countersunk head wood screws	0.077	0.194	0.03	0.385	0.34	0.116	0.06	0.053	0.062	5/8"~3 1/2"	ASME B18.6.1
#12	Cross recessed oval countersunk head wood screws	0.091	0.22	0.031	0.438	0.389	0.132	0.067	0.06	0.062	3/4"~3 1/2"	ASME B18.6.1
#12	Slotted oval countersunk head wood screws	0.091	0.22	0.031	0.438	0.389	0.132	0.067	0.06	0.062	3/4"~3 1/2"	ASME B18.6.1
#12	Cross recessed flat countersunk head wood screws	0.091	0.22	0.031	0.438	0.389	0.132	0.067	0.06	0.062	3/4"~3 1/2"	ASME B18.6.1
#12	Slotted flat countersunk head wood screws	0.091	0.22	0.031	0.438	0.389	0.132	0.067	0.06	0.062	3/4"~3 1/2"	ASME B18.6.1
#14	Cross recessed oval countersunk head wood screws	0.1	0.246	0.035	0.507	0.452	0.153	0.075	0.07	0.093	3/4"~4"	ASME B18.6.1
#14	Slotted oval countersunk head wood screws	0.1	0.246	0.035	0.507	0.452	0.153	0.075	0.07	0.093	3/4"~4"	ASME B18.6.1
#14	Cross recessed flat countersunk head wood screws	0.1	0.246	0.035	0.507	0.452	0.153	0.075	0.07	0.093	3/4"~4"	ASME B18.6.1
#14	Slotted flat countersunk head wood screws	0.1	0.246	0.035	0.507	0.452	0.153	0.075	0.07	0.093	3/4"~4"	ASME B18.6.1
#16	Cross recessed oval countersunk head wood screws	0.111	0.272	0.038	0.544	0.485	0.164	0.075	0.075	0.093	1 1/2"~5"	ASME B18.6.1
#16	Slotted oval countersunk head wood screws	0.111	0.272	0.038	0.544	0.485	0.164	0.075	0.075	0.093	1 1/2"~5"	ASME B18.6.1
#16	Cross recessed flat countersunk head wood screws	0.111	0.272	0.038	0.544	0.485	0.164	0.075	0.075	0.093	1 1/2"~5"	ASME B18.6.1
#16	Slotted flat countersunk head wood screws	0.111	0.272	0.038	0.544	0.485	0.164	0.075	0.075	0.093	1 1/2"~5"	ASME B18.6.1
#18	Cross recessed oval countersunk head wood screws	0.125	0.298	0.042	0.635	0.568	0.191	0.084	0.083	0.093	2 1/2"~5"	ASME B18.6.1
#18	Slotted oval countersunk head wood screws	0.125	0.298	0.042	0.635	0.568	0.191	0.084	0.083	0.093	2 1/2"~5"	ASME B18.6.1
#18	Cross recessed flat countersunk head wood screws	0.125	0.298	0.042	0.635	0.568	0.191	0.084	0.083	0.093	2 1/2"~5"	ASME B18.6.1
#18	Slotted flat countersunk head wood screws	0.125	0.298	0.042	0.635	0.568	0.191	0.084	0.083	0.093	2 1/2"~5"	ASME B18.6.1
#20	Cross recessed oval countersunk head wood screws	0.125	0.324	0.046	0.65	0.582	0.196	0.084	0.09	0.093	2"~5"	ASME B18.6.1
#20	Slotted oval countersunk head wood screws	0.125	0.324	0.046	0.65	0.582	0.196	0.084	0.09	0.093	2"~5"	ASME B18.6.1
#20	Cross recessed flat countersunk head wood screws	0.125	0.324	0.046	0.65	0.582	0.196	0.084	0.09	0.093	2"~5"	ASME B18.6.1
#20	Slotted flat countersunk head wood screws	0.125	0.324	0.046	0.65	0.582	0.196	0.084	0.09	0.093	2"~5"	ASME B18.6.1
#24	Cross recessed oval countersunk head wood screws	0.143	0.376	0.05	0.762	0.685	0.23	0.094	0.106	0.093	2"~6"	ASME B18.6.1
#24	Slotted oval countersunk head wood screws	0.143	0.376	0.05	0.762	0.685	0.23	0.094	0.106	0.093	2"~6"	ASME B18.6.1
#24	Cross recessed flat countersunk head wood screws	0.143	0.376	0.05	0.762	0.685	0.23	0.094	0.106	0.093	2"~6"	ASME B18.6.1
#24	Slotted flat countersunk head wood screws	0.143	0.376	0.05	0.762	0.685	0.23	0.094	0.106	0.093	2"~6"	ASME B18.6.1

Video: What Are Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) Used For? in use

Wood Screws Explained: A Beginner’s Guide

Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.

Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

01

Cold heading

Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

Head dimensions and under-head radius checked at set-up and per shift.
02

Thread rolling

Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

Go / no-go ring gauges to ISO 965 tolerance class 6g.
03

Heat treatment

Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

Core hardness and tensile tested per lot to ISO 898-1.
04

Surface treatment

Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

What drive type do Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) use?

Drive depends on the head style — socket (hex key), cross (Phillips/Pozi) or slot. A recessed drive resists cam-out when driven with power tools; check the product head style on this page.

What material should Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) be for outdoor use?

For damp, coastal or chemical environments specify A4 (316) stainless or a suitably coated steel. For indoor or dry use, A2 (304) stainless or zinc-plated steel is normally adequate.

Are Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) made to a recognized standard?

Yes — they are manufactured to ASME B18.6.1, so dimensions are interchangeable between suppliers when you quote the standard on your order.

What are Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) used for?

Inch wood screws with flat or oval countersunk heads, slotted and Phillips. They are supplied to ASME B18.6.1.

Can I get a quote for Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.

Typical Applications for Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips)

How to Specify Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) for Your Application

Installation & Assembly Practice

Common Selection Mistakes with Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips)

Where Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) Are Not the Right Choice

Need a wood screws, inch (flat and oval head, slotted and phillips) outside the standard range?

Technical Drawing

Request a Quote

Request a Quotation

Dimensions & Specifications (ASME B18.6.1)

Video: What Are Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) Used For? in use

Manufactured in our own plant

Cold heading

Thread rolling

Heat treatment

Surface treatment

Frequently Asked Questions

Related Pages

Wood Screws, Inch (Flat and Oval Head, Slotted and Phillips) Specification Guides

Related Fastener Applications